I Very short answer type questions:
1. Whether the Moon is luminous or non-luminous body?
2. What is Umbra?
3. What is a shadow?
4. Mention the names of three types of objects you have studied?
5. What is Penumbra?
II Short answer type questions:
1. Why is the Moon not considered as a non-luminous body?
2. State difference between transparent and translucent objects with examples.
3. When does a shadow form?
4. Write any three differences between shadow and image.
5. Define reflection of light.
III Long answer type questions:
1. What is reflection of light? Explain reflection of light with the help of an activity.
2. Explain that light has the property of rectilinear propagation with the help of a diagram.
3. How will you make a simple pin hole camera?
4. What are the essential conditions for the formation of a shadow?
5. Explain the characteristic features of images formed by a plane mirror with the help of diagram.
Answers
Answer:
1) Non - luminous body
2)During an eclipse, two shadows are cast. The first is called the umbra.It is the dark center of the eclipse shadow.
5)The second shadow is called the penumbra. The penumbra gets larger as it goes away from the sun.
3)A shadow is a dark (real image) area where light from a light source is blocked by an opaque object.
Explanation:
4)Shadows are formed when opaque objects obstruct the path of light. Image is seen when light comes from the object after reflection or refraction enters the observer's eye. No light enters the eye from the shadow of the object. Image gives more information such as colour, structure, etc.
6)Reflection: When light falls on a shiny surface, it bounces back. This phenomenon is called reflection. We are able to see images in mirrors or in water, because of reflection.
hope it will help u
Mark me as brainilist